#pg_3{
    /*position:absolute;*/
    /*display: none;*/
    /*top:0;*/
    background: url('images/p3_bg.jpg') no-repeat center center;
    background-size: 100%;
    -webkit-transition:top 2s linear;
       -moz-transition:top 2s linear;
        -ms-transition:top 2s linear;
         -o-transition:top 2s linear;
            transition:top 2s linear;
    top:100vh;
}
#pg_3 .pg3_title{
    background: url('images/金鸡贺春.png') no-repeat center center;
    background-size: 100%;
    width:90vw;
    height:95vh;
    position:absolute;
    left:0;
    right:0;
    top:0;
    bottom:0;
    margin:auto;
}

#pg_3 .pg3_second{
    background: url('images/p3_couplet_second.png') no-repeat center center;
    background-size: 100%;
    width:30vw;
    height:70vh;
    position:absolute;
    left:0;
    /*right:0;*/
    top:0;
    bottom:0;
    margin:auto;
}
#pg_3 .pg3_first{
    background: url('images/p3_couplet_first.png') no-repeat center center;
    background-size: 100%;
    width:30vw;
    height:70vh;
    position:absolute;
    /*left:0;*/
    right:0;
    top:0;
    bottom:0;
    margin:auto;
}
#pg_3 .pg3_blessing{
    background: url('images/p3_blessing.png') no-repeat center center;
    background-size: 100%;
    width:30vw;
    height:30vh;
    position:absolute;
    left:0;
    right:0;
    /*top:2vh;*/
    bottom:-3vh;
    margin:auto;
    -webkit-animation:circle 2s infinite linear;
       -moz-animation:circle 2s infinite linear;
        -ms-animation:circle 2s infinite linear;
         -o-animation:circle 2s infinite linear;
            animation:circle 2s infinite linear;
}
.fadeIn{
    -webkit-transition:top 2s linear;
       -moz-transition:top 2s linear;
        -ms-transition:top 2s linear;
         -o-transition:top 2s linear;
            transition:top 2s linear;
    top:100vh;
}